Gui Ferreira

@UCGd8ACZ918e3EjbWxiuyK-A - 18.7K subscribers

I help developers work simpler, move faster, and keep quality high.

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Stop Writing Specs. Let AI Interrogate You Instead

Stop Writing Specs. Let AI Interrogate You Instead Gui Ferreira

3.4K views - 2 weeks ago

I Don't Know If I'd Recommend Software Development Anymore

I Don't Know If I'd Recommend Software Development Anymore Gui Ferreira

3.9K views - 1 month ago

Getting Started with GitHub Spec Kit

Getting Started with GitHub Spec Kit Gui Ferreira

1 month ago

I Used GitHub's Spec Kit for 30 Days. Here's the Truth.

I Used GitHub's Spec Kit for 30 Days. Here's the Truth. Gui Ferreira

7.8K views - 1 month ago

Using code assistants for More than CODE

Using code assistants for More than CODE Gui Ferreira

1 month ago

You're Refactoring When You Should Be Deleting

You're Refactoring When You Should Be Deleting Gui Ferreira

1.8K views - 1 month ago

AI Agent System Design in 30 Minutes

AI Agent System Design in 30 Minutes Gui Ferreira

14.3K views - 3 months ago

Your Code Assistant Just Leaked Your Database Password

Your Code Assistant Just Leaked Your Database Password Gui Ferreira

1.5K views - 4 months ago

If you are using Cursor AI do this to protect your secrets

If you are using Cursor AI do this to protect your secrets Gui Ferreira

4 months ago

If you are using Claude Code do this to protect your secrets

If you are using Claude Code do this to protect your secrets Gui Ferreira

4 months ago

AI Evaluations in .NET

AI Evaluations in .NET Gui Ferreira

5 months ago

LLM Observability with Helicone and dotnet

LLM Observability with Helicone and dotnet Gui Ferreira

5 months ago

Improve your AI .NET code output with AGENTS.md

Improve your AI .NET code output with AGENTS.md Gui Ferreira

5 months ago

You’re Not Writing DRY Code, You’re Just Confused

You’re Not Writing DRY Code, You’re Just Confused Gui Ferreira

7.5K views - 6 months ago

Stop Wasting Time: Let Cursor AI Plan & Execute for You

Stop Wasting Time: Let Cursor AI Plan & Execute for You Gui Ferreira

1.2K views - 6 months ago

Simple Problem ≠ Simple Solution

Simple Problem ≠ Simple Solution Gui Ferreira

1.8K views - 7 months ago

If Your Integration Tests FEEL Impossible to Debug, Watch This!

If Your Integration Tests FEEL Impossible to Debug, Watch This! Gui Ferreira

1.4K views - 7 months ago

Still Writing Using Statements in Every File? Why?

Still Writing Using Statements in Every File? Why? Gui Ferreira

1.7K views - 7 months ago

This SIMPLE Image Trick Eliminated 40% of My Website's Load Time

This SIMPLE Image Trick Eliminated 40% of My Website's Load Time Gui Ferreira

966 views - 7 months ago

Why Most .NET Developers Don't Need MediatR

Why Most .NET Developers Don't Need MediatR Gui Ferreira

2.4K views - 7 months ago

Why OSS Going Commercial is Actually a GREAT Opportunity

Why OSS Going Commercial is Actually a GREAT Opportunity Gui Ferreira

754 views - 8 months ago

I Rebuilt My Entire Website in 2 Days (The Minimalist Way)

I Rebuilt My Entire Website in 2 Days (The Minimalist Way) Gui Ferreira

1.3K views - 8 months ago

Long Polling is Underrated - Here's Why It's Brilliant

Long Polling is Underrated - Here's Why It's Brilliant Gui Ferreira

1.7K views - 8 months ago

MIND Principles: Write Code Easy to Test

MIND Principles: Write Code Easy to Test Gui Ferreira

1.4K views - 8 months ago

Microsoft Just Replaced VSTest and Most .NET Developers Missed It

Microsoft Just Replaced VSTest and Most .NET Developers Missed It Gui Ferreira

4.9K views - 9 months ago

Why Caching Isn't as Easy as It Looks

Why Caching Isn't as Easy as It Looks Gui Ferreira

1.3K views - 9 months ago

How I Built a React UI on Top of My .NET RAG API (using Cursor AI)

How I Built a React UI on Top of My .NET RAG API (using Cursor AI) Gui Ferreira

1.2K views - 9 months ago

Every Backend Dev Goes Through These 3 Phases

Every Backend Dev Goes Through These 3 Phases Gui Ferreira

3.3K views - 9 months ago

Cursor 1.0 Just Got Personal – and I Love It

Cursor 1.0 Just Got Personal – and I Love It Gui Ferreira

979 views - 9 months ago

Why This Tiny .NET 10 Change Is a Big Deal?

Why This Tiny .NET 10 Change Is a Big Deal? Gui Ferreira

2.4K views - 10 months ago

How to Use Embeddings with Postgres (Surprisingly Easy)

How to Use Embeddings with Postgres (Surprisingly Easy) Gui Ferreira

1.9K views - 10 months ago

What If You Never Had to Install a Full Package Again?

What If You Never Had to Install a Full Package Again? Gui Ferreira

1.7K views - 10 months ago

How I Built a RAG App in .NET (Using Azure AI in Minutes)

How I Built a RAG App in .NET (Using Azure AI in Minutes) Gui Ferreira

4K views - 10 months ago

5 SQLite Features You Never Knew About!

5 SQLite Features You Never Knew About! Gui Ferreira

1.1K views - 11 months ago

How This .NET Developer Built a Successful macOS App in 30 Days (With ZERO Swift Experience)

How This .NET Developer Built a Successful macOS App in 30 Days (With ZERO Swift Experience) Gui Ferreira

2.6K views - 11 months ago

Building a macOS App as a .NET Developer - Full Conversation with Amichai Mantinband

Building a macOS App as a .NET Developer - Full Conversation with Amichai Mantinband Gui Ferreira

11 months ago

4 Ways to Culture-Proof Your C# xUnit Tests | Never Break Your Pipeline Again!

4 Ways to Culture-Proof Your C# xUnit Tests | Never Break Your Pipeline Again! Gui Ferreira

1.5K views - 11 months ago

You NEED to change this on your xUnit Integration Tests

You NEED to change this on your xUnit Integration Tests Gui Ferreira

3.6K views - 11 months ago

.NET 💔 OSS Gui Ferreira

4.8K views - 1 year ago

How to INSTANTLY Improve Your Tests With xUnit v3 CancellationTokens

How to INSTANTLY Improve Your Tests With xUnit v3 CancellationTokens Gui Ferreira

2.1K views - 1 year ago

Understand Any Project in Minutes with Cursor

Understand Any Project in Minutes with Cursor Gui Ferreira

3.4K views - 1 year ago

This is the Skill you NEED as a software engineer

This is the Skill you NEED as a software engineer Gui Ferreira

1.5K views - 1 year ago

Check this before choosing a Key-Value Store

Check this before choosing a Key-Value Store Gui Ferreira

1.5K views - 1 year ago

Rate Limiting Algorithms Explained

Rate Limiting Algorithms Explained Gui Ferreira

2K views - 1 year ago

Why You SHOULD Care about the CAP Theorem

Why You SHOULD Care about the CAP Theorem Gui Ferreira

1.1K views - 1 year ago

Make Cursor AI Debug C# Code in 9 minutes!

Make Cursor AI Debug C# Code in 9 minutes! Gui Ferreira

19.6K views - 1 year ago

Testing is such a WASTE of Time...

Testing is such a WASTE of Time... Gui Ferreira

2.1K views - 1 year ago

How to Protect Your API Resources

How to Protect Your API Resources Gui Ferreira

2.1K views - 1 year ago

The Secret to Database Scaling Without Breaking 💥

The Secret to Database Scaling Without Breaking 💥 Gui Ferreira

1.9K views - 1 year ago

Best 10 Architecture Diagramming Tools for 2025

Best 10 Architecture Diagramming Tools for 2025 Gui Ferreira

20.2K views - 1 year ago

Is Hexagonal Architecture Good for a Simple App?

Is Hexagonal Architecture Good for a Simple App? Gui Ferreira

1.4K views - 1 year ago

Get Into FLOW Faster as a Developer

Get Into FLOW Faster as a Developer Gui Ferreira

1.7K views - 1 year ago

Watch This Before Upgrading FluentAssertions!

Watch This Before Upgrading FluentAssertions! Gui Ferreira

2.9K views - 1 year ago

How to Integration Test with the new .NET Testing Framework

How to Integration Test with the new .NET Testing Framework Gui Ferreira

4.6K views - 1 year ago

Building Serverless APIs with AWS Lambda and DynamoDB in .NET

Building Serverless APIs with AWS Lambda and DynamoDB in .NET Gui Ferreira

1.1K views - 1 year ago

Your code Knows too much!

Your code Knows too much! Gui Ferreira

6.5K views - 1 year ago

10 Surprising Lessons Software Developers Can Learn From 'Factfulness’

10 Surprising Lessons Software Developers Can Learn From 'Factfulness’ Gui Ferreira

2K views - 1 year ago

5 Apps for 2025 that I’ve Been Using Lately

5 Apps for 2025 that I’ve Been Using Lately Gui Ferreira

3K views - 1 year ago

I Tested a Redirect API & Here's What I Learned

I Tested a Redirect API & Here's What I Learned Gui Ferreira

1.4K views - 1 year ago

Simple Tips to Effectively Apply Feature Folders

Simple Tips to Effectively Apply Feature Folders Gui Ferreira

4K views - 1 year ago